本标准规定了用烧失法测定玻璃纤维增强塑料树脂含量试验的试样、仪器与设备、试剂、试验步骤及试验报告等。本标准适用于树脂基体能燃尽的玻璃纤维增强塑料。本标准不适用于所含矿物填料在最低燃烧温度下分解或不溶于盐酸的增强塑料。
1 Scope
This standard specifies specimens, apparatus and equipment, reagents, test procedures and test reports for the determination of resin content of glass fiber reinforced plastics by calcination methods.
This standard is applicable to the glass fiber reinforced plastics whose resin matrix can be burnt out.
This standard is not applicable to the glass fiber reinforced plastics containing mineral fillers which degrade at temperatures below the minimum calcination temperature or are insoluble in hydrochloric acid.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 1446 Fiber-reinforced Plastics Composites — The Generals for Determination of Properties
3 Principle
A test specimen is weighed and subsequently calcinated at a defined temperature. The specimen is then reweighed and the non-combustible matter content (glass + filler) obtained by determining the difference in mass of a test specimen before and after calcination in one of the following ways:
a) In the case of materials containing no fillers the glass content is calculated directly from the difference in mass; the volume content of glass fiber is obtained by conversion;
b) In the case of materials containing both glass and filler, the glass and filler remaining after calcination are separated by dissolution of the filler in hydrochloric acid. The difference between the mass of the specimen before calcination and the mass of the dried specimen after reaction with acid is used to measure the glass content. The filler content is obtained by calculating the difference between the mass of the specimen after calcination and the mass of the dried specimen after reaction with acid.
The test method requires that all weighing be made at constant mass after repeated calcination and/or drying. In those cases where known materials are being tested regularly, a minimum time for the calcination and drying stages may be determined by experiment to ensure that constant mass has been reached.
Foreword II
1 Scope
2 Normative References
3 Principle
4 Specimen
5 Apparatus and Equipment
6 Reagents
7 Test Procedures
8 Calculation
9 Test Result
10 Test Report
Annex A (Normative) Fiber Volume Content of Glass Fiber Reinforced Plastics
Annex B (Normative) Test Method for Fiber Mass Content of Glass Fiber Reinforced Plastics Containing Mineral Fillers
Annex C (Informative) List of the Clauses in This Standard and the Equivalent Clauses in ISO 1172:1996
